Please help me ill give branliest

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Me. i can't figure out this question. give an explanation too. .